// This file is part of Eigen, a lightweight C++ template library
// for linear algebra.
//
// Copyright (C) 2017 Gael Guennebaud <gael.guennebaud@inria.fr>
//
// This Source Code Form is subject to the terms of the Mozilla
// Public License v. 2.0. If a copy of the MPL was not distributed
// with this file, You can obtain one at http://mozilla.org/MPL/2.0/.

#ifndef EIGEN_RESHAPED_HELPER_H
#define EIGEN_RESHAPED_HELPER_H

namespace Eigen {

enum AutoSize_t
{
    AutoSize
};
const int AutoOrder = 2;

namespace internal {

    template <typename SizeType, typename OtherSize, int TotalSize> struct get_compiletime_reshape_size
    {
        enum
        {
            value = get_fixed_value<SizeType>::value
        };
    };

    template <typename SizeType> Index get_runtime_reshape_size(SizeType size, Index /*other*/, Index /*total*/) { return internal::get_runtime_value(size); }

    template <typename OtherSize, int TotalSize> struct get_compiletime_reshape_size<AutoSize_t, OtherSize, TotalSize>
    {
        enum
        {
            other_size = get_fixed_value<OtherSize>::value,
            value = (TotalSize == Dynamic || other_size == Dynamic) ? Dynamic : TotalSize / other_size
        };
    };

    inline Index get_runtime_reshape_size(AutoSize_t /*size*/, Index other, Index total) { return total / other; }

    template <int Flags, int Order> struct get_compiletime_reshape_order
    {
        enum
        {
            value = Order == AutoOrder ? Flags & RowMajorBit : Order
        };
    };

}  // namespace internal

}  // end namespace Eigen

#endif  // EIGEN_RESHAPED_HELPER_H
